Posting between the same team members in their topic thread of team list is legal of course, no rule about it; However, posting issues, comments, that is not related to the purpose of the topic is illegal in DC, unlike it in DNF where there is no rule about it either, so it's considered as a spam material. But, Since so far everything is within limits let's pretend nothing happened, after all, EX can't survive without spamming their own topic.